7 Maintenance and service
7.1 General maintenance
The system requires no user maintenance. Maintenance must be done by
trained personnel. The frequency of the maintenance depends on the
process and can be adjusted according to the user experience. Refer to
Maintenance plan on page 48 for the maintenance schedule.
We recommend a monthly visual inspection of the dry pump system. Check
that the electrical supply cord, hoses and pipelines connected to the pump
are in good condition and are secured properly.
7.2 Maintenance plan
More frequent maintenance may be required if the pump is used to pump
aggressive gases or vapours, solvents, organic substances and acids, or if
the pump is operated continuously at high operating temperature.
Table 19
Maintenance plan
Operation
Frequency
(months)
Service
indicator
Reference
Inspect and clean the inlet strainer 12 No Inspect and clean the inlet strainer on
page 48
Inspect and clean the external fan
cover if required
12 No Clean the external fan grill on page 48
Replace the pump bearings 60 Yes Replace the pump bearings on page
49
Replace the pump controller 120 Yes Replace the pump controller on page
49
Electrical safety check 60 No Electrical safety check on page 49
Note:
The pump must be returned to the Service Technology Centre (STC) for
maintenance. For service indicator codes, refer to Table: Service indicator
codes.
7.3 Inspect and clean the inlet strainer
Whenever the pump is disconnected from the vacuum system or annually:
▪ Remove the inlet strainer from the pump inlet, refer to Figure: General
view.
▪ Clean the pump inlet and remove the debris that may have
accumulated.
▪ Examine the inlet strainer and if necessary, clean it with a cleaning
solution suitable for the substances pumped.
▪ Install the inlet strainer before you reconnect the pump to the vacuum
system. Refer to Mechanical installation on page 19.
7.4 Clean the external fan grill
If the fan cover is not kept clean, the air ow over the pump can be
restricted and the pump may overheat.
To clean the fan grill:
300902516_002 - 10/2020 - © Leybold
48
Maintenance and service
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